You can use RACF® to protect your SMS control data sets from deliberate or accidental deletion or alteration. Senior administrators should have ALTER access to SMS control data sets to enable them to create, retrieve, update and delete the SMS control data sets. Allow only the storage administration group to have UPDATE access to SMS control data sets. Give other users READ access to the active SMS configuration so they can browse the SMS configuration using ISMF applications. Give the COMMDS and ACS routine libraries a universal access of NONE.